Pretty Face Manga by Yasuhiro Kano

Rando Masashi, a self-centered, brash karate star, was the victim of a horrific bus accident that left him comatose, his face terribly disfigured by extensive burns. Genius plastic surgeon Dr. Manabe saved Rando's life and went to work on his face, gradually reconstructing it based on a photograph found in the wreckage of the bus. When Rando wakes up from his coma, a year has passed, and Dr. Manabe has made remarkable progress. But in a cruel twist of fate, the photo that the doctor used as his reference was not a picture of Rando, but of Rina Kurimi, the girl whom Rando has a crush on!